Dumb-waiter.



JJ GTSHALL.

DUMB WAITEB. APPLIOATION'HLED M411. zo, 1909.

Patented July 27, 1909.

y uw. Q

v @Ronny JAMES M. GOTSHALL, OF PILLGW, PENNSYLVANIA, ASSIGNOR OF ONEbHAL TO ARRY V.

RUNK, GF PILLOW, PENS'YJVAIAr DUEtB-WAITER.

'/'o llt whom 'it ymuy ro'ncern:

, )le it known that. l. Janus M Corsi-nien, a citizen etl the United t'ttates. residing at iillow, in the county ot Dauphin and 4State of Pennsylvania` have invented certain new and at'ter itullydescrihed and claimed, and illusl trated `in the accompanying drawings, in whichm Figure l is a perspective view ot' the invention; Fig. 2 is a detail in elevation. shone ingtportions of the locking devices: Fig. 3 is a detail of a portion ot' the devices shown in i Fig. Q. but at right angles thereto, and Fig; l

4 is a bottoni plan view ot' the parte shown in Flg,

\ Throuofhout the t'ollow'ine' deseri )tion and e l Y t on the several. tignres of the drawings similar parts are referred to by like reference characters.

The type oit' elevating' devicesI to which the present invention relates is the t'orm of dumb-waiters designed for use in eoi'meeton with kitchens or dining rooms and operativeln thisv i thereto from the cellar or basement. particular species ot dumhuvaiters n' is eustomary l'oi' the 'top ot' the dumb-waiter cup-M board to lie Hush with 'the kitchen or dining.' room tioor when Said cupboard is in its normal down position, and the fiamc is held in 1,

such position by any suitable forni oi catch. Again. in this t'orm oif dumb-waiters it is de sirahle and essential that the coiinterweigrht.`l used in the elevation thereotl shall he sul'lieiently heavier than the `c|'1l' boai' d at its maximum load to insure that the euplioard will operate upward with preeision.

lightly loaded Such overweights have a tend. enoy to operate the cupboard so freely that it is practically iml'iossible to hold the same at a position lower than its extreme upper limit of movement after being' onee released. 'lo overcome this objection is the principal object ot' this invention.

.ln carrying` out the invention there isl shown'at ll0 a' fragment ot a kitchen or dining room tioor having! sills 1l, and to which are connected a series of guiding' rodsI l2 extending downward to the cellar or basement tloorwhere they maybe held 1n a substan- Specifiction of Lett/ers Patent..

Application led March 20, 1909.

This 5 heine' true. It the cupboard is empty or:

Patented. July 27, 1909.

Serial No. 434,719.

I tially rigid position by connection to `a I traine '13. Y y 1 The dumb-waiter cage or cupboard lll is l provided with a top l5j adapted to lie fiat li with the lioor l0, and is provided preferably upon three sides with inclosing Walls so as i to render the cupboard mouse-prooi". The l cupboard is provided with any suitable ninnber ot. shelves t6. and in front oi each shelfis a hinged door 1T having a latch 18. The

l downwardly forming; a frame,-sa'id postc0- 1: operating with the guiding rods l2. As a i suitable means -for eti'eeting cooperation beitween said depending' frame and guiding l rods Iv employ a pair oi cross bars and 20, each Secured to a pair of said posts and having' holes receiving the rods. Counterl weight boxes 21 are connected to said b ars t hy means of flexible connections 22 passing l over direction pulleys Q3, .in a well known inianner. Said boxes are designed to carry t sutticient weights to insure the prompt. elevation of the cupboard with its maximum load.

ik series of bell c 'anks 24 are pivoted upon the inner tace of lone of the side walls of the cupboard. one of the bell cranks being engageable by they inner aee of each of the doors l?. rlhe inner arms oi all ot' the hell cranks have pin and slot eormee'tions with a vertically movable har extending downwardly through all ot' the shelves. A yoke i 26 embraces one of the guiding rods 12 and isadapted to engage in any one, ot' a Series o'l notchesl l2 formed thereon. The yoke shown as mounted against the bottoni ot the bar 20 and movable-in guides 2T. rock shaft 28 is journaled in the adjacent. corner post if) and to the rock shattis vconnected an arm 2t) having connection as by a wire 30 tending downwardly through a slot. 20a in i the bar 20, the latter arni having pin and slot connection with the yoke 26. .t operates to cause, prompt, release of the yoke 2li from the notched rod. 'Each of the bell cranks 24 is provided with a spring 2l, 1 having' sutiieientI strength to lift, the bar 25 and cause the yoke 26 to engage the notched rod against the tension of the spring 26", upon the opening' of the door adjacent thereto. .lhe hell cranks adjacent to any or all closedA doors may remain in inactive position with respect. to the bar 25, by virtue of lthe corner posts 1t) of the euphoardv extend with the member and also an arm 3l, e.\''

u 1 A sp1 ing may he located at. any lsuitable point and is kslots in the bar.

The normal position of the bar when all of the doors are closed, is such that: the pins of the bell cranks will be at the upper ends of the slots.

'lhe bell cranks may be pivoted at any suitable points,v but it is preferable to so position them that the ends thereot` which coperate with the doors will be directly opposite the door latches t8, whereby operation of the door to I 'eset a bell crank against the tension ot its spring 24 will not strain the door hinges. Ilurthermore, this arrangement also hasthc effect that the bell crank through its spring will cause the prompt opening of the door upon the unlatching thereof. lty will now be Seen that upon the unlatching of any door of the cupboard, irrespective ot' the position or velevation of the cupboard7 the locking mechanism will prom]' tly cooperate with the guiding devices to prevent movement ot' the cupboard until the door is again closed.

The details of construction may be varied to a considerable extent and' it is not my de- Lsire to be limited to the precise construction shown, except as may be necessitated by the .state ot' th al't.

l, claim:

1. ln a dumb-waiter, the combination ot' a cupboard having an outwardly swinging' door thereon and a' downwardly extending trame, stationary guiding means copel'ating with said frame. and locking means cooperatiim with the `inner face of said door and with said guidin means whereby when the door is open the ocking means will engage the guiding' means to prevent movement oi the clipboard.

2. ln a dumb-waiter, the combination ot a cupboardhaving a plurality of doors, guidin g means for the cupboard, and locking;r means coperatin(r with the cu board and guiding means whereby upon tie opening in'nncdiately of any one cupboard door the guiding means will be engaged to lock the cupboard from Y, movement.

l 3. In a dun'ib-waiter, the combination ot' a l cupboard lia-ving a door and a downwardly l proj ecting frame, a series ot' stationary guide rods cooperatingl with the trame, and locking' mechanism comprising' a yoke movable with the cupboard and ,embracing one of said rods. a, device engagcable by the door, fand connections between said device and said yoke. whereby when the door is open the yoke 'will interlock with the embraced rod.

4. In a d umh-waiter. the combination of a cupboard having' a door and a downwardly project ing traine, a series of stationary guide rods cooperating with the frame, one of said rods beine` notched, a yoke carried by the trame and cooperating with the notched rod. a device carried by the cupboard and engageable by the door. and connections be-` tween the said device and yoke whereby when the door is open the yoke will engage ithe notched rod to prevent movement of the clipboard. L 5. In a dumb-waiter, the combination o t' a cupboard having doors7 stationary guiding l means t'or the cupboard, a series ot' bell t cranks carried by the cupboard and coperatingr with the respective. doors. a locking member coperatiiig with the xguidingV means` and connections between the bell cranks and locking" member hereby upon opening any cupboard door the said member will lock the cupboard trom movement.

Witnesses:

YV. R. (lo'isnwnm (linux li. (lumix.

ln testimony whereof l atiix my signature 80 

